Blockchain Security Expert - Chain Security Evaluation Track

About the Company

CertiK leads blockchain security by protecting smart contracts and blockchains with cutting-edge Formal Verification technology. Founded by Computer Science professors of Yale University and Columbia University, CertiK has audited and secured over $500B in assets, including many of the world's top blockchain projects.

About You

You're a self-starter who thrives on tackling the toughest and most meaningful problems. You're comfortable with the unknown and understand that startup life means wearing multiple hats. You're accountable and obsessed with improvement, both in yourself and in others. You're up to the challenge of building a world-class company that aims to be the infrastructure for more secure software for all.

About the Role

The primary responsibility of this role is for CertiK's security-related services. Intersecting cybersecurity and blockchain, CertiK's security offerings include security consulting, security reviews, security auditing of smart contracts and blockchains, verification of smart contracts, penetration testing, and more.

As a Security Engineer at CertiK, you will contribute to the security offerings of the company, working with the rest of the security team to deliver the best products and services. You might engage directly with CertiK's existing and future clients, participate in expanding security-related products and services, and follow the blockchain world on emerging security problems and trends.

Responsibilities

• Conduct in-depth security evaluations on blockchain nodes, validators, consensus mechanisms, mempool behavior, networking layers, and chain modules.
• Review and analyze blockchain frameworks such as Cosmos SDK, CometBFT, Geth, Hyperledger, and other L1/L2/L3 infrastructures.
• Identify security issues related to consensus safety, chain halting, permission model flaws, and block production vulnerabilities.
• Implement and run custom scripts and test scenarios to simulate real-world validator/network behaviors, chain stress conditions, and edge cases.

Requirements

• Strong written and spoken English communication skills.
• High diligence and strong attention to detail, especially in multi-step testing and long-running experiments.
• Solid understanding of blockchain architecture and node internals (e.g., Cosmos SDK / CometBFT, Go-Ethereum (Geth) internals, and Hyperledger Fabric / Besu).
• Strong scripting & automation skills with Python or Bash.
• Familiarity with Docker and containerized testing environments.
• Prior experience in manual Web3 security auditing is preferred, but not required.

What We Offer

• Opportunity to shape the national conversation on blockchain and security.
• Collaborate with industry-leading security researchers, technologists, and global institutions.
• Flexible work environment and mission-driven culture.

Compensation & Benefits

Target annual compensation for this role performed in the US is $120,000 – $180,000. The exact compensation at which this job is filled will be determined by the skills and experience of qualified candidates.

• Medical, vision, and dental insurance.
• 401(k) plan with company matching.
• Life and accidental death and dismemberment insurance.
• HSA (with high deductible plan) and FSA.
• Flexible paid time off and holidays.